Direct production of biodiesel via simultaneous esterification and transesterification of renewable oils using calcined blast furnace dust

Yi-Tong Wang, Wen-Jie Cong, Ya-Nan Zeng, Yu-Qing Zhang, Jing-Long Liang, Jun-Guo Li, Li-Qun Jiang and Zhen Fang

Renewable Energy, 2021, vol. 175, issue C, 1001-1011

Abstract: Direct production of biodiesel by both esterification and transesterification of renewable oils with acid value (AV) of 9.6–28.9 mg KOH/g using calcined blast furnace dust is studied. Blast furnace dust calcined at 600–700 °C obviously promotes efficient biodiesel production because of the crystal form transformation from lead sulfate particles in dust into active lead oxide, lead sulfide, and lead particles. It is found for the first time that lead oxide, lead sulfide and lead particles can resist saponification from fatty acids to catalyze raw renewable oils to biodiesel with catalytic activity order as follows: lead oxide > lead > lead sulfide > lead sulfate. Biodiesel production process is optimized according to an orthogonal design with biodiesel yield of 92 wt% obtained at AV of 9.6 mg KOH/g (82 wt% after 5 cycles). Biodiesel yield of 84 wt% is achieved at AV of 28.9 mg KOH/g with acidity of 0.18 mmol/g. Calcined blast furnace dust presents potential applications in the production of biodiesel from renewable oils with high AVs.

Keywords: Blast furnace dust; Solid industrial waste; Waste recycling; Biodiesel; Renewable Jatropha oils; Biofuels (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:175:y:2021:i:c:p:1001-1011

DOI: 10.1016/j.renene.2021.05.013

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